Composite Hand Guard with Integral Rail for Firearm Accuracy
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Solution Overview
Problem
Existing firearm hand guards and accessory rails lack a combination of strength, light-weight, and stiffness, which can lead to accuracy issues due to relative movement of accessories during use.
Innovation Solution
An integrated hand guard and accessory rail system featuring an elongated tube with a monolithic shell wall that forms both the hand guard and rail, providing a stiff and light-weight structure with a cross-sectional shape orthogonal to the barrel, including a narrower neck and wider head, and segmented head for enhanced stability and accessory mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a traditional separate hand guard and rail system is used, then manufacturing is simpler, but strength and stiffness are reduced leading to accuracy issues
Solution Approach 1:
The patent combines the hand guard and accessory rail into a single integrated structure formed from one continuous piece of material (monolithic construction). This merging eliminates the need for separate components and fasteners, thereby increasing structural strength and stiffness while preventing relative movement between the hand guard and rail, which directly addresses the accuracy issues mentioned in the contradiction.
2Manufacturing precision
If a monolithic integrated structure is used, then stiffness and accuracy are improved, but manufacturing complexity increases
Solution Approach 1:
The patent employs contour cutting and shaping processes that modify the material parameters during manufacturing to create the integrated structure. By using continuous contour cutting methods, the manufacturing process achieves the required precision for the integrated hand guard and rail assembly, maintaining accuracy while managing the complexity through standardized cutting operations.
3Strength
If material is added to increase strength, then structural integrity improves, but weight increases
Solution Approach 1:
The patent applies local quality by varying the material distribution and thickness in specific areas of the integrated structure. The hand guard and rail sections have optimized local thicknesses and densities where strength is needed, while other areas maintain lighter construction. This localized material optimization provides the necessary structural integrity without uniformly increasing the overall weight of the assembly.
Data Source
AI summary
An integral hand guard and accessory rail has an elongated shell with a shell wall adapted to be spaced-apart from and circumscribing a barrel of a firearm. The shell has a portion adapted to be griped by a user and defining a hand guard. The shell wall has another portion protruding radially away from the barrel defining an elongated rail, the rail having a cross-sectional shape orthogonal to the axis with a narrower neck a wider head coupled to the shell by the neck.